How popular is Keelie?

Keelie is an uncommonly occurring first name for women. Keelie is an equally unusual surname for all people. (2000 U.S. Census)

Which version is better?

with its source form and related girl names. Keeley(#1943 a year ago) and Keely are the prominent varying forms of Keelie (not ranked). Other forms, like Keeli, are uncommon. These forms of Keelie were favored as birth names in the year 1997 (average #679) and have become much less common since, with the form Keely going out of style. (Top 2000 Names, 2015)